I don't know CA laws. In Ohio, a repo is an instant credit blemish, and the ownership of the car reverts to the loan holder. So, in Ohio, knowing where the car is after a repo is meaningless. In fact, taking the car- once the bank has exercised the right to reposess would probably land the person taking the car in criminal court.
Again, giving up the rights of ownership but still having the obligation is a financial nightmare.